261022061456 has 40 divisors (see below), whose sum is σ = 544663472640. Its totient is φ = 120464885376.

The previous prime is 261022061437. The next prime is 261022061459. The reversal of 261022061456 is 654160220162.

It is not an unprimeable number, because it can be changed into a prime (261022061459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6649535 + ... + 6688673.

It is an arithmetic number, because the mean of its divisors is an integer number (13616586816).

Almost surely, 2^261022061456 is an apocalyptic number.

261022061456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

261022061456 is an abundant number, since it is smaller than the sum of its proper divisors (283641411184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261022061456 is a wasteful number, since it uses less digits than its factorization.

261022061456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71223 (or 71217 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 261022061456 in words is "two hundred sixty-one billion, twenty-two million, sixty-one thousand, four hundred fifty-six".